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參數(shù)資料
| 型號： | LT1576 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.5A, 200kHz Step-Down Switching Regulator(可調(diào)輸出，1.5A, 200kHz，步降開關穩(wěn)壓器) |
| 中文描述： | 1.5A的，200kHz降壓型開關穩(wěn)壓器（可調(diào)輸出，1.5A的，200kHz的，步降開關穩(wěn)壓器） |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 290K |
| 代理商： | LT1576 |
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1
LT1576/LT1576-5
1.5A, 200kHz Step-Down
Switching Regulator
BOOST
LT1576
V
IN
SHDN
OUTPUT**
5V, 1.25A
* RIPPLE CURRENT RATING
≥
I
/2
** INCREASE L1 TO 30
μ
H FOR LOAD
CURRENTS ABOVE 0.6A AND TO
60
μ
H ABOVE 1A
SEE APPLICATIONS INFORMATION
INPUT
6V TO 25V
1576 TA01
C2
0.33
μ
F
C
100pF
D1
1N5818
C1
100
μ
F, 10V
SOLID
TANTALUM
C3*
10
μ
F TO
50
μ
F
OPEN = ON
D2
1N914
L1**
15
μ
H
V
SW
FB
BIAS
GND
V
C
+
+
R2
4.99k
1R1
5V Buck Converter
Efficiency vs Load Current
I
Constant 200kHz Switching Frequency
I
1.21V Reference Voltage
I
Fixed 5V Output Option
I
Easily Synchronizable
I
Uses All Surface Mount Components
I
Inductor Size Reduced to 15
μ
H
I
Saturating Switch Design: 0.2
I
Effective Supply Current: 1.16mA
I
Shutdown Current: 20
μ
A
I
Cycle-by-Cycle Current Limiting
I
Fused Lead SO-8 Package
The LT
1576 is a 200kHz monolithic buck mode switching
regulator. A 1.5A switch is included on the die along with
all the necessary oscillator, control and logic circuitry. The
topology is current mode for fast transient response and
good loop stability. The LT1576 is a modified version of the
industry standard LT1376 optimized for noise sensitive
applications.
In addition, the reference voltage has been lowered to
allow the device to produce output voltages down to 1.2V.
Quiescent current has been reduced by a factor of two.
Switch on resistance has been reduced by 30%. Switch tran-
sition times have been slowed to reduce EMI generation.
The oscillator frequency has been reduced to 200kHz to
maintain high efficiency over a wide output current range.
The pinout has been changed to improve PC layout by
allowing the high current high frequency switching cir-
cuitry to be easily isolated from low current noise sensitive
control circuitry. The new SO-8 package includes a fused
ground lead which significantly reduces the thermal resis-
tance of the device to extend the ambient operating tem-
perature range. There is an optional function of shutdown
or synchronization. Standard surface mount external parts
can be used including the inductor and capacitors.
I
Portable Computers
I
Battery-Powered Systems
I
Battery Charger
I
Distributed Power
, LTC and LT are registered trademarks of Linear Technology Corporation.
LOAD CURRENT (A)
0
E
100
95
90
85
80
75
70
0.25
0.50
0.75
1.00
1576 TA02
1.25
1.50
V
OUT
= 5V
V
= 10V
L = 33
μ
H
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
N
U
相關PDF資料 |
PDF描述 |
|---|---|
| LT1578-2.5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1578IS8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1578IS8-2.5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1578C | CAP 22UF 50V ELECT TG SMD |
| LT1578CS8 | CAP 47UF 50V ELECT TG SMD |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT-1576-111-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT1576-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 200kHz Step-Down Switching Regulator |
| LT1576C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 200kHz Step-Down Switching Regulator |
| LT1576CS8 | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1576CS8#PBF | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
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